scle·​ro·​scope | \ˈsklirəˌskōp, -ler-\

Definition of scleroscope 

: a sclerometer devised especially for use with metals in which the height of rebound of a small standard object dropped from a fixed height onto the surface of a specimen is used as a measure of the hardness of the specimen

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History and Etymology for scleroscope

from Scleroscope, a trademark

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